Don't leak Mlt repository on first run (attempt to fix Windows fail on first run)

Make "Video" folder as default for clip import on first run

src/dialogs/clipcreationdialog.cpp

@@ -360,9 +360,6 @@ void ClipCreationDialog::createClipsCommand(KdenliveDoc *doc, const QString &par
     l->addStretch(5);
     f->setLayout(l);
     QString clipFolder = KRecentDirs::dir(QStringLiteral(":KdenliveClipFolder"));
-    if (clipFolder.isEmpty()) {
-        clipFolder = QStandardPaths::writableLocation(QStandardPaths::MoviesLocation);
-    }
     QScopedPointer<QDialog> dlg(new QDialog((QWidget *)doc->parent()));
     QScopedPointer<KFileWidget> fileWidget(new KFileWidget(QUrl::fromLocalFile(clipFolder), dlg.data()));
     auto *layout = new QVBoxLayout;

src/dialogs/wizard.cpp

@@ -384,7 +384,8 @@ void Wizard::slotUpdateCaptureParameters()
 void Wizard::checkMltComponents()
 {
     m_brokenModule = false;
-    Mlt::Repository *repository = Mlt::Factory::init();
+    
+    std::unique_ptr<Mlt::Repository> repository(Mlt::Factory::init());
     if (!repository) {
         m_errors.append(i18n("<li>Cannot start MLT backend, check your installation</li>"));
         m_systemCheckIsOk = false;

src/mainwindow.cpp

@@ -1576,6 +1576,9 @@ bool MainWindow::readOptions()
     if (!initialGroup.exists() || KdenliveSettings::sdlAudioBackend().isEmpty()) {
         // First run, check if user is on a KDE Desktop
         firstRun = true;
+        //Define default video location for first run
+        KRecentDirs::add(QStringLiteral(":KdenliveClipFolder"), QStandardPaths::writableLocation(QStandardPaths::MoviesLocation));
+
         // this is our first run, show Wizard
         QPointer<Wizard> w = new Wizard(true, false);
         if (w->exec() == QDialog::Accepted && w->isOk()) {